Ontario Geological Survey
Permanent Link to this Record:
MDI42C12NW00003
| Record Name(s) | Golden Giant - 1980 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1986-Oct-14 |
| Date Last Modified | 2022-May-18 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Molybdenum, Barite, Antimony, Mercury, Silver
Township or Area: Bomby
Latitude: 48° 41' 41.28" Longitude: -85° 54' 13.36"
UTM Zone: 16 Easting: 580673.59 Northing: 5394108.9 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42C12NW
Point Location Description: Large operating mine
Location Method: Other
Access Description: Approx. 35 km east of Marathon and 50 km south of Manitouwadge, Ontario. Highway 17 bisects the area in an east-west direction and provides the best access to the area. The main CP line also traverses the area and roughly parallels the highway within about 1km to the south.
Subeconomic gold mineralization found in the 1940s. Sporadic shallow exploration over next 30 years. Higher gold prices in the 1970s prompted renewed exploration. Restaked by Don McKinnon and John Larche, who optioned claims to Golden Sceptre Resources and Goliath Gold Mines Ltd. 1980: Noranda options claims. 1983: development and construction started. April 1985: first gold bar poured. 1987: Noranda’s gold holdings consolidated into Hemlo Gold Mines Inc. 1996: Hemlo Gold Mines Inc. merged with Battle Mountain Gold. 2001: Battle Mountain Gold Company merged with Newmont Canada Ltd. 2001: Newmont Mining acquired Battle Mountain Gold. 2006: Newmont Canada closed the mine. 2010: Barrick purchased the property to extend the reserves at David Bell.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 18 | 42C12NW0149 | 42C12NW0149 |
| 42C12NW0013B1 | 42C12NW0167 | 42C12NW0167 |
| 63.3958 | 42C12NW0144 | 42C12NW0144 |
| 63.4477 | 42C12NW8664 | 42C12NW8664 |
| 63.4447 | 42C12NW0029 | 42C12NW0029 |
| 42C12NW0014A1 | 42C12NW0162 | 42C12NW0162 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Neoarchean Geochronological Age: 2800 - 2600 MA
Dec 07, 2005 (Q Unknown) - The 'stratigraphy' in the mine area has been subdivided into 4 major formations. From south to north they are the Cache Lake, Rule Lake, Moose Lake and Cedar Creek formations. The Moose Lake formation is the most important economically as it hosts the main hemlo deposit and a number of the pthe rmineralized zones. These formations represent a package of rocks approx. 3km thick within the lower part of the Heron Bay group. Rocks in the min strike at 115 degrees and a dip of 65 degrees northeast. The Cache Lake formation, which forms the structurally lowermost unit of the 'stratigraph'; comprises mafic metavolcanic schists and granofels. In the deposit area, this formation is about 150m thick. It was used as a distinct marker during initial deep exploration drilling of the deposit. Drill hles were normally stopped once they reached this formation, being deemed through the potentially favourable ore zones. The formation tends to be more highly sheared and contains hematite-filled fractures adjacent to its contact with the overlying Rule Lake formation. The Rule Lake formation consists of laminated metasedimentary schists and gneisses. The total thickness of this formation is about 150m in the mine area. The basal portion of the formation is dominated by amphibole-feldspar-biotite gneiss, whereas the upper portion is comprissed of calc-silicate rich metasedimentary rocks which commonly contain kyanite, staurolite, and garnet adjactent to the structurally overlying contact. The formation is comprised of rok types similar to the Cedar Creek formation and there is no observable difference between the two. The Moose Lake formation within the Golden Giant Mine can be subdivided into four units which, from south to north are; Lower Mineralized Zone, Footwall Schists, Mafic Fragmental, Main Ore Zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Barite | Economic | Ore | ||||
| 2 | Cinnabar | Economic | Ore | ||||
| 3 | Gold | Economic | Ore | ||||
| 4 | Molybdenite | Economic | Ore | ||||
| 5 | Orpiment | Economic | Ore | ||||
| 6 | Pyrite | Economic | Ore | ||||
| 7 | Pyrrhotite | Economic | Ore | ||||
| 8 | Realgar | Economic | Ore | ||||
| 9 | Stibnite | Economic | Ore | ||||
| Carbonate | Alteration | Carbonatization | 1 | Unknown | Disseminated | ||
| Tourmaline | Alteration | Tourmalinization | 2 | Unknown | Disseminated | ||
| Pyrite | Alteration | Pyritic | 3 | Unknown | Disseminated | ||
| Albite | Alteration | Feldspathization | 4 | Unknown | Disseminated | ||
| Silicate | Alteration | Silicification | 5 | Unknown | Disseminated | ||
| Biotite | Alteration | Biotitic | 6 | Unknown | Disseminated | ||
| Sericite | Alteration | Sericitization | 7 | Unknown | Disseminated | ||
| Microcline | Alteration | Feldspathization | 8 | Unknown | Disseminated |
Dec 07, 2005 (Q Unknown) - The Hemlo Gold Deposit does not intersect the surface at the Golden Giant Mine. The orebodies occur predominantly within 2 zones, the structurally upper 'Main Ore Zone' and the structurally lower 'Lower Mineralized Zone'. Subdivisions of the gold-molybdenite bearing Main Ore Zone, based on predominant mineralogy, are feldspathic ore and sericitic ore; baritic -feldspathic ore; and siliceous ore. Freldspathic ore consists of microcline and quartz, along with pyrite, molybdenite, and green mica. The Barite-feldspathic ore consists of feldspathic ore fragments within a gold-molybdenite-poor barite +_ pyrite matrix. The Lower Mineralized Zone occurs at, or near, the footwall contact of the felsic, quartz-phyric felsic rocks of the QFPC. This zone ranges from 1 - 20 m thick, and contains ore-grade mineralization in thicknessess ranging from 2-5m, locally within the Lower Mineralized Zone are described as feldspathic, sericitic, baritic and pyritic. Quartz eyes are not present in feldspathic and sericitic types. The ore is cut by mafic and dacitic dikes. At least one mafic dike has undergone folding and boudinage followed by subsequent shortening during D3.
Dec 07, 2005 (Q Unknown) - One of the greatest difficulties is distinguishing between 1) unaltered and altered rocks; 2) alteration directly associated with the Hemlo gold deposit and alteration from other events (eg. intrusions, metamorphism); and 3) relative ages of types of alteration.
| Rank | Classification |
|---|---|
| 1 | Metamorphic |
| Rank | Characteristic |
|---|---|
| 1 | Fault |
| 2 | Sheared |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Golden Giant | 2005 | Proven Mineral Reserve | 478292 | Schnieders et al, 2005 | 478,292 t at 10.67 g/t Au for 164,105 total contained ounces Au | Gold 10.67 Grams per Tonne |
| Golden Giant | 1994 | Unclassified | 10582000 | Muir et al., 1994 | 10,582,000 tonnes ore at 11.10 g/t Au | Gold 11.1 Grams per Tonne |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 2005 | 19245215 |
Gold 11183560 |
Scott et al, 2007, ROA 2006, OFR 6202 p1 | Production to end of 2005: 19,245,215 t @ 10.64 g/t Au for 6,780,373 oz Au. Mine closed Jan.2006. |
Book - Geology and Gold Deposits of the Hemlo Area
Publication Number: FT GB A1 Date: 1991
Author: Muir, T.L., Schnieders, B.R., and Smyk, M.C.
Publisher Name: GAC-MAC-SEG
Location:
Journal - Canadian Mining Journal July 1985
Publication Number: CMJ 1985 Page: S1-16 Date: 1996
Author:
Publisher Name:
Location:
MonoMap - Geology of the Hemlo area, District of Thunder Bay
Publication Number: R217 Page: 51-57 Date: 1982
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Compend - Report of activities, 1983, Regional and Resident Geologists
Publication Number: MP117 Page: 72-75 Date: 1984
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
File - Mineral Deposit Files Thunder Bay
Publication Number: Date:
Author:
Publisher Name:
Location:
MonoMap - Precambrian Geology, Hemlo Gold Deposit Area
Publication Number: R289 Date: 1997
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Hemlo Gold Deposit Area
Publication Number: OFR5877 Date: 1993
Author: Muir T.L.
Publisher Name: Ontario Geological Survey
Location:
Mono - Report of Activities 2004, Resident Geologist Program, Thunder Bay South Regional Resident Geologist Report: Thunder Bay South District
Publication Number: OFR6148 Page: 2 Date: 2005
Author: Schnieders B.R., Scott J.F., Magee M.A., Muir T.L., Komar C.L.
Publisher Name: Ontario Geological Survey
Location:
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